Headquarters of the Morris County Historical Society, 68 Morris Ave., Morristown. The Victorian Italianate mansion includes two decorative arts galleries as well as period rooms with major pieces from the two Acorn Hall families and their descendants. The museum is open Mondays and Thursdays from 10 a.m. to 4 p.m., Sundays from 1 to 4 p.m. For a tour of Acorn Hall, cost is $5 for adults, $4 for seniors and $2 for students. Children younger than 12 admitted free. Call (973) 267-3465 or visit http://www.acornhall.org/